Caydenxfilippi

I have a MY05 with 171k on it. Bought the car around six months ago. I haven’t really had any problems with the car up until 2 days ago. I filled up my tank and was cruising around (not really doing any pulls) when I started misfiring. Car was able to make it home under low RPMs, but the whole was home it smelled like death lol (no way to explain the smell other than like extreme garlic/almost gasoline smell). I used my OBD scanner and it gave me codes for Clyinder 2 misfire, Cylinder 4 misfire, and a random misfire. Today I went and bought some spark plugs are the local store and swapped them in. After installing, I swapped the 2&4 coil packs with the 1&3 coil packs to see if I’ll get a new code for cylinder 1&3 (checking to see if they were bad coil packs) when I started it up just now, car still has that same horrendous smell and is now throwing code for cylinder 1,2&4 misfire as well as a random misfire again. Should I buy all new coil packs or do you guys think this motors is toast??

UPDATE: after analyzing the car more, I decided to star the car back up and see if maybe i was jusr running rich. the car started up and sounded better, but when i revved the car it did not sound great and seemed to still be misfiring.

blueosprey90

I'm no big expert. In fact I have little knowledge. But you need to do some better diagnostics.

First, catalytic converter smell is something like rotten eggs. Kind of sulfuric.

Second, is it possible you got a tank of diesel fuel? That might not react too well with the catalytic converter. .

Smell your oil. If it smells like gasoline (or diesel), STOP. Don't run the engine. You oil will be compromised.

Do a compression test to see if you still have compression. Then a leak down test. Then check your timing.

And I wouldn't be running the engine. It might not be toast now, but it might be if you keep running it.

windhund116

Sounds like a case of bad gas (fuel, that is).

Caydenxfilippi

I just smelled my oil cap, and it seems like im getting some gas smell. cant really smell into the actual engine but from the cap it seems like theres some gas in it. its not a crazy pungent gasoline smell, but does worry me a bit.
n

Chuck S

"Not really doing any pulls" tells me the opposite.

Bad fuel is a suspect since this started soon after a fill. Drain the engine oil. Send a sample to Blackstone Labs. Don't drive the car until you know what happened.

-- Chuck

B serious

Basic diagnosis first, before replacing an engine.

Maybe it needs coil packs. Buy Denso ones from rockauto.

Buy a fresh set of plugs while you are at it.

Do a compression test.

etc.

Typically, one doesn't just jump to a blown engine conclusion without just cause. Breaking this engine takes some catastrophic event. So...ask a lot of questions.

B serious

How old is the oil? Old oil in a car that does a lot of short trips or idling will smell like gas. Old oil in any car will smell like gas.

Caydenxfilippi

Oil only has like 1300-1400 miles on it. Not too bad

Caydenxfilippi

nah. I’m mean other than a small rev up to like 5-6k i wasn’t banging gears at all. I’m regaining from doing any pills since my rear hubs need replaced. I’m starting to suspect its the gas. Just is super weird. I usually fill up at a local off brand place but this recent tank I bought at a Chevron... wouldn’t think chevron would do that but idk

Chuck S

5000-6000rpm is where this engine lives. Normal driving.

I assume premium grade fuel? Surprisingly there have been questions here from a couple of folks who didn't know the S2000 requires at least 91 octane. Last fill before this was?

-- Chuck